Bash

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Bash or Bourne-again shell is the default Unix shell for most Linux systems. it was created by GNU project as a free alternative to Bourne shell

History

Bash shell was written by Brian Fox and was first released in 1989.

To check what Bash version is installed

bash --version

For help

bash --help

You can customize shell for each user using ~/.bashrc in his own home directory.

Remember that dotfiles (any file starting with a dot) are hidden.

And for everyone (including root) in /etc/bash.bashrc.